Kupfer- und Legierungspulver, die in Hart- oder Weichloetverfahren verwendet werden, werden normalerweise zuerst nach der Chemie beurteilt, aber die tatsaechliche Produktionsleistung haengt von mehr als nur dem Legierungsanteil ab. Korngroessenverteilung, Oxidkontrolle und Morphologie beeinflussen das Benetzungsverhalten, die Fliesseigenschaften, die Fugenfuellung und die Konsistenz der endgueltigen Baugruppe stark. Ein Pulver, das die chemische Spezifikation erfuellt, aber eine inkonsistente Korngroesse oder uebermassigen Oberflaechenoxid aufweist, kann Fugen mit Hohlraeumen, unvollstaendiger Fuellung oder variabler Festigkeit erzeugen. Fuer Pastenformulierungen muss das Pulver auch mit dem Flussmittelsystem kompatibel sein und eine stabile Rheologie waehrend Lagerung und Dosierung aufrechterhalten. MEPOSO liefert Kupfer-, Bronze- und Vorlegierungspulver fuer Hart- und Weichloetanwendungen mit kontrollierter Korngroesse, niedrigem Oxidgehalt und dokumentierter Chargengleichmaessigkeit.
Particle Size Distribution for Paste and Powder Applications
The optimal particle size depends on the uygulama method. For brazing paste formulations used in automated dispensing or screen printing, fine tozs with D50 of 10-25 micrometres and D90 below 45 micrometres are typically required. The narrow size distribution ensures uniform paste viscosity, consistent print deposits and predictable melting behaviour. For manual brazing with toz uygulama or ring preforms, coarser tozs (D50 of 30-75 micrometres) may be acceptable. In all cases, the absence of oversized particles is critical: even a small fraction of particles above the specification limit can cause nozzle blockage in dispensing equipment or irregular melting in the joint. MEPOSO production includes sieving and classification steps with verified particle size distribution for every batch.
Oxide Control and Its Impact on Joint Quality
Surface oxide on metal toz particles directly affects brazing and soldering performans. Excessive oxide acts as a barrier to wetting, preventing the molten filler metal from flowing into and filling the joint gap. It can also generate gas during heating, causing porosity in the finished joint. For bakır tozs used in brazing, oxygen content below 0.3% is typically required for good wetting in hydrogen atmosphere brazing. For tin-based solder tozs, low oxide is essential for paste stability and consistent reflow behaviour. MEPOSO controls oxide content through atomisation atmosphere management, proper toz handling and sealed packaging, with oxygen content documented on every certificate of analysis.
MEPOSO Powders for Brazing and Soldering
MEPOSO tedarik eder bakır, bronz, bakır-phosphorus and bakır-nickel tozs for brazing uygulamas, as well as tin and tin alloy tozs for soldering. All tozs are produced with controlled particle size, documented chemistry, low oxide content and full batch traceability. MEPOSO ile iletişime geçin to discuss your specific brazing or soldering toz requirements.
MEPOSO ile iletisime gecin.
